Thanks for the replies.
The generator is an Onan 4000.
My problem is also confused by the fact that my engine batteries do not charge the house batteries. Could that be the same problem as the generator?
I am further frustrated by the fact that none of the RV dealers around me will work on generators and they don't have a suggestion on who will work on them.
The RV is new to me and I did install a Victron battery monitor when I first got the RV. The monitor seems to work fine when connected to shore power or unplugged. However it does not show any amp input when the vehicle engine is running. It also shows no amp input when I am holding the generator start button down.
Again, any ideas are appreciated. RV.net has been a great resource to me in the past.
Mark